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Rense, W. A.

Publications and source records attributed to Rense, W. A..

12 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1976

Evidence of outward flow of plasma in a coronal hole

The solar spectrum was photographed in the range 200-700 A with a grazing-incidence stigmatic rocket spectrograph. Doppler shifts of the three coronal lines Si XI (303 A), Mg X (610 A), and Mg IX (368 A) were measured for various regions of the solar disk, including a coronal hole. From the relative shifts in the latter region, an average outward velocity of 16 km/s was computed for the plasma in the coronal hole. The full widths at half-maximum for the above lines were appreciably less in the coronal-hole region than in a quiet region, indicating a lower temperature in the hole. Both the measured velocity and the temperature results are consistent with solar-wind data and with current theories of coronal holes.

Cushman, G. W.↗
NASA NTRS1973

Broad band solar EUV absorption in the earth's upper atmosphere.

Observation data on solar radiation intensity, based on measurements performed as a function of time for three broad wavelength bands between 280 and 1030 A by a wheel spectrometer on Oso 5 during sunrise and sunset, are compared with predicted intensity variations based on Cira models. The differences between sunrise and sunset data, as well as those between observed and predicted data are discussed.

Allen, K. H.↗
NASA NTRS1972

Solar flares in the EUV observed from OSO-5.

Solar flares in three broad EUV spectral bands have been observed from OSO-5 with a grating spectrophotometer. Results are given for three large flares of Mar. 12, Mar. 21 and Apr. 21, 1969. In general, the time dependence of the flare intensity in each band is characterized by a slowly varying component with impulsive bursts superimposed. Bands 2 (465 to 630 A) and 3 (760 to 1030 A) are quite similar in their time variations, but band 1 (280 to 370 A) shows less impulsive structure, and declines more slowly. Absolute EUV intensities for the flares are estimated, and a comparison is made with the 2800 mc/sec radio emission. A flare model is proposed to account for the EUV time variations during a large flare.

Kelly, P. T.↗
NASA NTRS1972

Monitoring of solar far ultraviolet radiation from the OSO-5 satellite

A spectrophotometer for monitoring the solar EUV in three broad wavelength bands is described. The kind of data obtained, along with sources of error, are presented. The content of the tape library which contains the data is outlined. The scientific results are discussed. These include the following: solar flares in the EUV, solar eclipse observations in the EUV, SFD's and relationship to solar flares, and the application of satellite sunrise and sunset data for the study of model upper atmospheres for the earth.

Rense, W. A.↗
NASA NTRS1970

Mass motion in the solar chromosphere

Solar chromosphere mass motion, studying macroturbulence influences on visible spectrum lines high resolution profiles from rocket spectrograms

Jones, R. A.↗